22220010222121 has 4 divisors (see below), whose sum is σ = 22220078024452. Its totient is φ = 22219942419792.

The previous prime is 22220010222097. The next prime is 22220010222257. The reversal of 22220010222121 is 12122201002222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10261803594025 + 11958206628096 = 3203405^2 + 3458064^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220010222121 - 2⁵ = 22220010222089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22220010282121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33407190 + ... + 34065823.

It is an arithmetic number, because the mean of its divisors is an integer number (5555019506113).

Almost surely, 2^{22220010222121} is an apocalyptic number.

It is an amenable number.

22220010222121 is a deficient number, since it is larger than the sum of its proper divisors (67802331).

22220010222121 is an equidigital number, since it uses as much as digits as its factorization.

22220010222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67802330.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 22220010222121 its reverse (12122201002222), we get a palindrome (34342211224343).

The spelling of 22220010222121 in words is "twenty-two trillion, two hundred twenty billion, ten million, two hundred twenty-two thousand, one hundred twenty-one".